Made the service basically start working

Encoder/FfmpegOptions.cs

@@ -0,0 +1,7 @@
+namespace Encoder;
+
+public class FFmpegOptions {
+    public const string SectionName = "FFmpeg";
+    public string TemporaryFilesPath { get; set; } = Path.GetTempPath();
+    public string FfmpegPath { get; set; } = Path.Combine(Environment.ProcessPath!, "ffmpeg");
+}